Rod-packing



(N5 Model.) 7 v J. O. FARMER 8B R. A. CALDER.

ROD PAGKINGJ No. 285,244. Patented Sept; 18, 1883 NITED STAT S PATENT, OFFICE.-

JAMES C. FARMER, OF PROVIDENCE, RHODE ISLAND, AND ROBERT A.

CALDER, OF LYNN, MASSACHUSETTS.

ROD-PACKlNG.

SPECIFICATION forming part of Letters Patent No. 285,244, dated September 18, 18Z3.

I Application filed June 11, 1883, (N model.)

To all whom it may concern i Be it known that v, c, J AMES 0. FARMER, 0 Providence, in the county of Providence and State of Rhode Island, and ROBERT A. CAL- DER, of Lynn, in thecounty of Essex and State of Massachusetts, haveinvented a certain new and useful Improvement in Rod Packings, of which the following is a description sufliciently full, clear, and exact to enasponding parts in the different figures of the drawings.

Our invention relates to means for packing the piston-rod; and it consists in a novel construction and arrangement of the parts, as

hereinafter more fully set forth and claimed, by which a more effective device of this character is produced than is now in ordinary use.

In the drawings, A represents the head of the steam-chest, B the stuffing-box, and C the gland. The stuffing-box is secured to the chest in the usual manner by the screw-bolts D, the gland being provided with a rabbet or shoulder, E, at its inner end, and fitted into the outer end of the stuffing-box, where it is secured by means of the screw-bolts G. The piston-rod II passes centrally through a hole in the head of the steam-chest, stuffingbox,

and gland, andis fitted to work longitudinally upwardly or outwardly into the gland C. A ring or bushing, 1?, is also disposed around the piston-rod within the gland .C, this ring being concaved on its lower or inner side, as shown at Q, a corresponding concavity being formed in the upper or outer end of the sleeve K, as shown at R. Y'

In packing the piston-rods of locomotive steanrengines in the ordinary manner, the packing material is usually placed in the stuffing-box B, where it is subjected to a great degree of heat from the steam which passes into' the box through thespace S around the piston-rod, thereby causing it to be rapidly destroyed. Our improvement is designed to obviate this obj ection,. and also to render it more convenient to repack the piston-rod; and to that end we make use of the sleeve -K, gland -C, and ring P, the sleeve being adapted to work in the gland, and the packing material U disposed around the piston-rod between the ,concaved end of the sleeve and ring P, as shown in Fig. 1, whereby it is removed as far as possible from the stufling-box, and thereby rendered much more durable than when the piston-rod is packed in the ordinary manner. The object of concaving the ring P and sleeve K, as described, is to force the packing U into closer contact with the piston-rod, as the sleeve approaches the ring, than would be possible were these parts made plain-or in nearly any other form. The flange L of the thimble Kis provided with a packing-ring, T, to make it work steam-tight in the stuffing-box, the spring N acting expansively to force the thimble against the packing material when the steam is shut off from the engine, and thus keep the packing material U in position. It will be obvious that by removing the bolts G and slipping the gland C outwardly or upwardly on the piston-rod H, the packing material may be readily introduced into the gland without opening the stuffing-box, thereby greatly facilitating the packing of the piston. Instead of the rabbet E, formed in the inner or lower end of the gland C, a rabbet may be formed in the outer or upper end of the stuffingbox B, to receive the gland and form a seat for the same, if preferred.

Having thus explained our invention, what we claim is 1. The combination, with a stuffingbox and tends into said piston-rod, of a gland fitted to the outer end of the stuffing-box, and a thinible within said I gland, said thinible being provided at its inner end with a grooved flange provided with a packing-ring, and an expansive spring interposed between said flange and the end of the steani-cylinder substantially as described.

stuffing-box, the outer end of which extends into said gland, said thiinble being provided at its inner end with a grooved flange provided with a packing-ring, substantially as described. v

2. The combination, with astnffing-box and piston-rod, of a detachable gland fitted t0 the outer end of the smiling-box, a thiinble within said stnffingbox, the outer end of which ex- JAMES C. FA RMER. ROBERT A. CALDER.

'Witnesses G. A. SHAW, A. W. SAWYER. 

